The Greater Scaup (Aythya marila), left has a more rounded head with more of a peak toward...

Townsend's Solitaire, left, photographed by Richard Stern in New Mexico and Northern Mocki...

2nd year, 3rd year, and 2 adult birds.

I went on one of Brian Patteson's great pelagic trips. Check out his website at Upload date not set / 0 comments / Flickr URL

I went on one of Brian Patteson's great pelagic trips. Check out his website at Upload date not set / 0 comments / Flickr URL

Second winter.

This bird (?dinosaur) was closely following the boat.

Adult.

Off outer banks.

First winter.

Off outer banks.

Hundreds of these birds were heading to their ocean roosting area.